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20. The engine stumbled for a few seconds and then idled nice and lopey like it did with the carb. The base tune in the programmer is pretty good and got the car running, but to squeeze out all the power and driveability we had to go into the advanced settings. Parameters like air fuel targets at idle, cruise and WOT can be adjusted. Even pump squirt and power valve adjustments can be made. MSD uses terms even old-school carb guys can understand.